Illustrative typical assembly — not a tested listing
3-Hour Fire Rated Wood Stud Wall — 2 layers 5/8" Type X
Typical 3-hour fire-rated wood stud wall assembly. 2x4 wood studs at 24" o.c. with R-15 mineral wool batt, 2 layers of 5/8" Type X gypsum board each side. Illustrative example of typical construction — not a tested UL or GA listing. Use a listed design (UL Product iQ or GA-600) for construction documents. This is an illustrative example of typical construction, not a tested UL or GA listing, and it carries no design number a plan reviewer can rely on. For construction documents, use a listed design.
- Reference number
- BS-W037 (BuildSpec, not a listing)
- Fire rating
- 3-Hour
- Assembly type
- wall
- Test standard
- Not a tested listing — illustrative
- BS-W0133-Hour · Wood Stud Wall — 2 layers 5/8" Type X on resilient channels · 2x4 wood studs at 16" o.c.
- BS-W0143-Hour · Wood Stud Wall — 2 layers 1/2" Type X · 2x4 wood studs at 16" o.c.
- BS-W0153-Hour · Wood Stud Wall — 2 layers 5/8" Type C · 2x4 wood studs at 16" o.c.
- BS-W0163-Hour · Wood Stud Wall — 3 layers 5/8" Type X · 2x4 wood studs at 16" o.c.
- BS-W0173-Hour · Wood Stud Wall — 3 layers 1/2" Type X on resilient channels
- BS-W0183-Hour · Wood Stud Wall — 3 layers 5/8" Type C · 2x4 wood studs at 16" o.c.
- IBC 2021 §703.2 (fire-resistance ratings by test or calculation)
- IRC 2021 §R302 (fire-resistant construction, where the IRC applies)
See how BS-W037 is built, layer by layer
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- Layer-by-layer components with thicknesses
- Cross-section diagram
- Alternates, exports and project bookmarks
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